Typefont wheel and belt for small printer

Abstract

This invention relates to a typefont belt and a typefont wheel for use in the small printer. The typefont belt made, for example of rubber, is fitted around a cylindrical support to compose the typefont wheel and is struck by a printing hammer provided in the support to perform printing on the printing sheet.

What we claim is: 
     
       1. A typefont wheel, comprising: a cylindrical support member having plural through-holes on the periphery thereof and being provided with a hammer therein; and   a typefont belt being fitted around said support member and having one end portion with a plurality of holes and having another end portion with, on the top face of said belt, a plurality of projections which are fitted into said plurality of holes, said belt including:   groups of typefonts arranged on the top face in a predetermined order;   first pin portions protruding from the bottom face of said belt at positions corresponding to positions where said groups of typefonts are provided on the top face so that said first pin portions fit into through-holes; and   second pin portions protruding from the bottom face at positions corresponding to positions where said projections are provided on the top face so that said second pin portions fit with said through-holes, said second pin portions being formed lower than said first pin portions to prevent striking hereof by the hammer.   
     
     
       2. The typefont wheel according to claim 1, wherein said plurality of holes provided on the one end portion of said belt are arranged in a staggered arrangement and said projections provided along the other end portion of said belt are also arranged in a staggered arrangement so as to fit into said holes. 
     
     
       3. A type wheel, comprising a support member and a typefont belt being fitted therearound, said typefont belt including: typefonts arranged on the top face of said typefont belt;   second fitting portions provided on the bottom face along one end portion of said belt;   second fitting portions provided on the bottom surface along the other end portion of said belt, and being shaped to fit with said first fitting portions;   a bonding layer provided between said first and second fitting portions for bonding them together; and   a protruding portion protruding from the position of the top face of said belt and corresponding to said first fitting portion, said protruding portion having a uniform height and having a width larger than that of said typefonts.   
     
     
       4. A typefont wheel according to the claim 3, wherein said protruding portion has a height smaller than that of said typefonts. 
     
     
       5. A typefont wheel, comprising: a typefont belt having type portions on the top face thereof and having pins protruding on the bottom face thereof positioned to correspond to the positions of said type portions; and   a cylindrical support member adapted to fit therearound said typefont belt, said support member being provided with through-holes for engaging said pins of the typefont belt and having a hammer therein, said through-holes of said cylindrical support member being formed substantially parallel with one another.   
     
     
       6. A typefont wheel according to the claim 5, wherein said through-hole of the support member have different diameters. 
     
     
       7. A typefont wheel, comprising: a support member having a peripheral surface with a plurality of holes therein; and   a sheet-type typefont belt being fitted around said support member, and including:   pins protruding from said belt for engaging said plurality of holes of said support member and having an end portion whereat recessed portions protrude from the bottom face thereof, said recess portions of a size to be pressed into the holes of said support member to engage said belt to said support member.   
     
     
       8. A typefont wheel according to claim 7, wherein said recessed portions are sized so as to engage said protruding pins. 
     
     
       9. A typefont wheel, comprising: a cylindrical support member being provided with a hammer therein; and   a typefont belt being fitted around said support member, and including:   first type bases protruding from said belt and supporting printing types thereon; and   second type bases being smaller in height than said first type bases protruding from said belt and supporting printing types thereon.   
     
     
       10. A typefont wheel according to the claim 9, wherein the printing types on said second type bases have a smaller area than those on said first type bases. 
     
     
       11. A typefont wheel, comprising: a cylindrical support member provided with a hammer therein; and   a typefont belt fitted around said support member, said belt including a plurality of strip portions each having a plurality of typefonts arranged in the circumferential direction of said support member, and a plurality of film portions thinner than said plurality of strip portions, each of said film portions being arranged between said strip portions, said strip portions and said film portions being integrally formed.